diff --git a/cmd/tools/vdoctor.v b/cmd/tools/vdoctor.v
index 20d7deff56..4a9734485a 100644
--- a/cmd/tools/vdoctor.v
+++ b/cmd/tools/vdoctor.v
@@ -15,6 +15,8 @@ fn (mut a App) println(s string) {
 }
 
 fn (mut a App) collect_info() {
+	a.line('V full version', version.full_v_version(true))
+	//
 	mut os_kind := os.user_os()
 	mut arch_details := []string{}
 	arch_details << '${runtime.nr_cpus()} cpus'
@@ -96,34 +98,32 @@ fn (mut a App) collect_info() {
 	}
 	a.line('OS', '${os_kind}, ${os_details}')
 	a.line('Processor', arch_details.join(', '))
-	a.line('CC version', a.cmd(command: 'cc --version'))
 	a.println('')
 	getwd := os.getwd()
 	vmodules := os.vmodules_dir()
+	vtmp_dir := os.vtmp_dir()
 	vexe := os.getenv('VEXE')
 	vroot := os.dir(vexe)
 	os.chdir(vroot) or {}
 	a.line('getwd', getwd)
-	a.line('vmodules', vmodules)
-	a.line('vroot', vroot)
 	a.line('vexe', vexe)
 	a.line('vexe mtime', time.unix(os.file_last_mod_unix(vexe)).str())
-	a.line('is vroot writable', is_writable_dir(vroot).str())
-	a.line('is vmodules writable', is_writable_dir(vmodules).str())
-	a.line('V full version', version.full_v_version(true))
-	vtmp := os.getenv('VTMP')
-	if vtmp != '' {
-		a.line('env VTMP', '"${vtmp}"')
-	}
+	a.println('')
+	a.line2('vroot', diagnose_dir(vroot), vroot)
+	a.line2('VMODULES', diagnose_dir(vmodules), vmodules)
+	a.line2('VTMP', diagnose_dir(vtmp_dir), vtmp_dir)
 	vflags := os.getenv('VFLAGS')
+	a.println('')
 	if vflags != '' {
 		a.line('env VFLAGS', '"${vflags}"')
+		a.println('')
 	}
-	a.println('')
 	a.line('Git version', a.cmd(command: 'git --version'))
 	a.line('Git vroot status', a.git_info())
 	a.line('.git/config present', os.is_file('.git/config').str())
+	a.println('')
 	//
+	a.line('CC version', a.cmd(command: 'cc --version'))
 	a.report_tcc_version('thirdparty/tcc')
 }
 
@@ -153,6 +153,11 @@ fn (mut a App) line(label string, value string) {
 	a.println('${label}: ${term.colorize(term.bold, value)}')
 }
 
+fn (mut a App) line2(label string, value string, value2 string) {
+	a.println('${label}: ${term.colorize(term.bold, value)}, value: ${term.colorize(term.bold,
+		value2)}')
+}
+
 fn (app &App) parse(config string, sep string) map[string]string {
 	mut m := map[string]string{}
 	lines := config.split_into_lines()
@@ -261,6 +266,24 @@ fn is_writable_dir(path string) bool {
 	return true
 }
 
+fn diagnose_dir(path string) string {
+	mut diagnostics := []string{}
+	if !is_writable_dir(path) {
+		diagnostics << 'NOT writable'
+	}
+	if path.contains(' ') {
+		diagnostics << 'contains spaces'
+	}
+	path_non_ascii_runes := path.runes().filter(it > 255)
+	if path_non_ascii_runes.len > 0 {
+		diagnostics << 'contains these non ASCII characters: ${path_non_ascii_runes}'
+	}
+	if diagnostics.len == 0 {
+		diagnostics << 'OK'
+	}
+	return diagnostics.join(', ')
+}
+
 fn main() {
 	mut app := App{}
 	app.collect_info()